How is dibutyl hydrogen phosphate (CAS: 107-66-4) typically synthesized?

Dibutyl hydrogen phosphate can be synthesized by the reaction of butyl chloride with sodium hydrogen phosphate in the presence of a base like sodium hydroxide. The reaction is carried out in an aprotic solvent such as tetrahydrofuran (THF) or dimethylformamide (DMF). The process involves the displacement of the chloride ion by the phosphate ion, forming dibutyl hydrogen phosphate as the major product. The yield and selectivity of the reaction are influenced by the choice of base and the reaction conditions.